Over a two-month period, contributed targeted backend improvements to open-source projects, focusing on reliability and data integrity. In the immich-app/immich repository, addressed image duplication handling by restoring deterministic sorting of images within duplicate groups using SQL aggregation with json_agg, which improved gallery consistency and user experience. Later, in nextcloud/desktop, stabilized database access during sync operations by removing redundant SQLite openings in C++, reducing lock scenarios and ensuring safer database workflows. Work emphasized precise bug fixing, clear commit traceability, and robust database management, leveraging skills in C++, SQL, and TypeScript to enhance stability and maintainability in complex backend systems.